A successful architect living in Denver with his wife and son, Brad Denning is haunted by the memory of his brother. The last image he has of Petey is that of a skinny nine-year-old heading down the road on his bike. Twenty years later, a man approaches Brad, claiming to be his long lost brother. Brad is skeptical until the man reports a litany of childhood memories that only Petey could know. Brad is overjoyed and welcomes Petey to his family. But when Brad comes home from a disastrous camping trip to find that his wife and son have been abducted, he becomes suspicious.